Cutting and drilling your 80% lower receiver can be a breeze, or a pain -- it truly depends on the drill bits and end mill bits you use to machine it. That’s why you need to invest in the highest quality bits available, like this 80% Jig Tool Kit from AMT. These HSS bits are designed for the Elite Builder Jig, but they can be used with any 80% lower receiver designed for the AR-15 and AR-9.
Aluminum-Ready HSS Bits
We like to offer HSS (high-speed steel) bits for completing 80% lowers because they provide some of the best results when machining billet (6061-T6) or forged (7075-T6) aluminum. Sized bit shafts reduce flex while working, and razor-sharp flutes make quick work of raw metal with clean, polished results.
AR-15Lowerreceivers.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally. Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website. We try our best to keep our shipping page current, but laws change daily.